The invention discloses a planar
waveguide imaging device and method. The device comprises a lighting source, an optical
grating film, an image source, an
optical alignment system, an optical
wave coupling input surface, a planar
waveguide substrate and optical
wave coupling output surfaces, wherein the lighting source is used for emitting optical
waves distributed in the exponential order, the optical
grating film is used for reflecting the optical
waves emitted by the lighting source, the image source is used for modulating the optical
waves reflected by the optical
grating film, the modulated optical waves can be transmitted through the optical grating film, the
optical alignment system is used for alignment of the optical waves transmitted by the optical grating film, the optical
wave coupling input surface is used for
coupling the aligned optical waves into a planar
waveguide, the planar waveguide substrate is used for conducting reflection propagation on the input coupled optical waves to form total reflection optical waves, and the optical wave
coupling output surfaces are used for expanding the view field and outputting the coupled optical waves out of the planar waveguide substrate. The device and method can improve the luminance uniformity of output images of a wearable waveguide, and designing and
machining difficulty is reduced.